As was the case with those other three overviews, our mainstream CHR analysis is comprised of data from PPM-market facilities that rank in the top 20 (6+, November 2017).

Bookends for these four recaps (news/talk and mainstream CHR) represent two of the three largest sample bases (historically) in the medium, with country being the other.

Nielsen Audio only releases audience estimates for facilities that subscribe to its services. Owing to that reason, ratings stats in this exclusive mainstream CHR breakdown are limited to stations that pay Nielsen Audio for its data.

The company’s November 2017 ratings period covered October 12 – November 8.